Rotary valve



Patented July 10, 1923.

UN T S ROTARY VALVE.

Application filed September 26, 1921. Serial No. 503,283.

To all whom it may concern:

Be it known that I, SAMUEL J. Tnrrr, Jr., a citizen of the United States, resldmg at Carlisle, in the county of Cumberland and State of Pennsylvania, have invented certain new and useful Improvements in Rotary Valves, of which the following 1s a specification.

This invention relates to certain mprovements in rotary valves and has relation more particularly to a valve of thls general character especially designed and adapted for use in connection with an internal combustion engine, and it is an obJect of the invention to provide a novel and lmproved valve of this general character constructed 1n a manner whereby the force of explosion serves to seat the valve in a manner to prevent leakage.

Another object of the invention 1s to provide a device of this general character having novel and improved means whereby the same may be effectively lubricated and wherein the carbon deposited on the valve seat, together with the lubricating medium, produces a coating or lining for the valve seat which serves to provide a further means to hold compression.

An additional object of the invention is to provide a valve of this general character provided with novel and improved means whereby the valve runs substantially entirely in oil, thereby increasin the efiiciency of the valve, and wherein said valve is provided with means to permit the intake and exhaust to pass therethrough more quickly and quietly.

The invention consists in the details of construction and in the combination and arrangement ofthe several parts of my mproved rotary valve whereby certain 1mportant advantages are attained and the device rendered simpler, less expensive and otherwise more convenient and advantageous for use, as will be hereinafter more fully set forth.

.The novel features of my invention will hereinafter be definitely claimed.

In order that my invention may be the better understood, I will now proceed to describe the same with reference to the accompanying drawings, wherein:

F1 re 1 is a fragmentaryview partly in section and partly in elevation illustrating a valve constructed in accordance with an embodiment of my invention and of a type particularly adapted for use in connection with an L-head motor, the line of section being substantially on the line a:w of Figure 2; v

Figure 2 is a sectional view taken substantiallyon the line 22 of Figure 1; and;

Figure 3 is a fragmentary view partly in section and partly in elevation illustrating a valve constructed in accordance with a further embodiment of my invention and particularly designed for a valve-in-head motor. a

As disclosed in the accompanying drawings, A denotes a port-ion of an L-head provided in its upper face with a frusto-conical valve seat 1 and in which snugly engages a tapered or conical valve 2. The upper or outer marginal portion of the valve 2 is provided with an outstanding annular flange 3 which overlies the surface portion of the head A defining the adjacent end of the valve seat 1..

The flange 3 has depending therefrom at a oint inwardly of its periphery an annular flange 4 which extends within an annular groove or channel 5 produced in the head A. The inner edge or face of the flange 4 is inclined inwardlyand upwardly, as indicated at 6, the inner wall of the groove or channel 5 substantially midway its height being correspondingly inclined, as at 7. The flange 4 serves as an oil ring and the depth of the groove or channel 5 is such as to have the bottom of said groove or channel spaced from the flange or ring- 4 to provide an oil basin in the cylinder head A.

The valve 2 is provided at its axial center with a stem 8 which is directed downwardly through the head A and terminates therebelow, the lower end portion of said stem having fixed thereto a gear 9 whereby the valve 2 may be rotated at desired speed and preferably at a speed whereby the valve 2 makes one-eighth of a turn upon one revolution of the crank shaft of the motor.

The lower portion 10 of the bore of the head A through which the stem 8 is directed is enlarged to substantially house an expansible member 11 herein disclosed as a coil spring encircling the stem 8 and inter posed between the base of the enlarged portion 10 and a washer 12 surrounding the stem 8 below the head A.

The washer 12 has contact with the roller bearings 14, said bearings being interposed J between the washer 12 and a second washer 15, the washer 15 having contact with the inner face of the gear 9. The bearings lfl are carried by the retainer 16.

The outer or larger end of the valve 2 at its axial center is provided with a cylindrical recess 17 from the lower portion of which radiates the circumferentially spaced ports 18, said ports being herein disclosed as four in number. The head A is prov1ded with the four intake ports 19 adapted for proper communication with an intake manifold, said ports belng substantially radial to the seat 1 and equi-distantly\ spaced around said seat, so that simultaneous communication between the recess 17 in the valve is had through the ports 18 with the orts 19, whereby the intake of the com- Eustible mixture is materially facilltated.

The head A adjacent each of the ports 19;

is provided with an exhaust port 20, the ports 18 in proper timed sequencecomrnunieating with the ports 20 so that the exploded gases may have quick discharge to the exhaust manifold. The ports 19 and 20 of each set of such ports are spaced apart a distance to compensate for the power stroke of the piston while the exhaust port 20 of one pair of ports 19 and 20 is spaced from the port 19 of the adjacent pairs of ports 19 and 20 a distance suflicient to permit the intake, compression and scavenger strokes of the piston before the ports 18 are brought into register with the intake ports 19 as occurs during the intake stroke of the plston. The lower portion of the valve seat 1 1s provided with an annular oil groove 21 with which communicates a port 22 leading from a suitable source of lubricant, preferably under pressure. As a lubricant, preferably oil, is forced through the port 22 and into the roove 21, the centrifugal force created by t e rotating valve 2 will cause said oil to move upwardly of the seat 1, resultlng in a film of oil over said seat so that the valve 2 substantially runs in oil. The oil that passes above the surface of the headA will be deflected by the oil ring 4 to the oil basin 5 and the oil collected in the basin 5 will be returned to the base portion of the valve seat 1 through the ports 23 leading from diametrically opposed points on the basm 5 to the bottom portion of the seat 1.

As is clearly indicated in Figure 1, the inner or smaller end of the valve 2 proper is spaced, as at 24, from the bottom of the valve seat 1, thereby providing an oil course.

- The oil collected within the course 24 passes down through an oil groove or duct 25 formed in the wall of the restricted portion of the bore of the head A through which the stem .8 is disposed so that the oil can be received within the substantially spiral groove 26 produced in the periphery of the portion of the stem within the restricted part of the menace bore through which said stemis directed. By this means, the stem is also effectively lubricated and the surplus or excess oil drops down upon the washers 12 and 15, resultin in the desired lubrication of the bearings 1 To further assure the requisite lubrication of the parts, the inner extremity of .one of the ports 23 has in communication there with an oil groove or duct 27 formed in the lower portion of the valve seat 1 and leading to and in communication with the annular oil groove 21. I

When an explosion occurs within a cylinder, the valve 2 is in a position to close the ports 18 and the ressure of the explosion within the recess 1 serves to force the valve 2 downwardly upon its seat. By this means, the compression or explosive force is not permitted to. escape which it would otherwise do if such force was directly on the valve seat. It is to-be understood that the spring 11, however, serves to constantly urge the valve 2 toward its seat.

It has been demonstrated in practice that the longer the engine runs, the more carbon is deposited on the valve seat and this carbon with the lubricating oil results in a hard substance which further serves to hold in all compression so that the efiiciency of the engine is materially increased. The yieldability of the spring 11 readily permits the valve 2 tocompensate for such substance formed on the valve seat.

In the embodiment of my invention illustrated in Figure 3, I disclose a rotary valve particularly adapted for use in connection with a valve-in-head motor and wherein H denotes the head of the cylinder with the under surface thereof provided with the valve seat 1' with which is associated a valve 2', said valve seat 1' and valve 2 and the parts concomitant thereto being constructed and operated in substantially the same manner as has hereinbefore been set forth with respect to the embodiment of my invention as disclosed in Figures 1 and 2.

The oil is delivered within the upper or restricted end portion of the valve seat 1' through the port or oil duct 22. This is the only port necessary in order to properly lubricate the valve 2' to assure the same to substantially run in oil.

From the foregoing description it is thought to be obvious that a rotary valve constructed in accordance with my invention is particularly well adapted for use by reason of the convenience and facility with which it ma be assembled and operated, and it will also e obvious that my invention is susceptible of some change and modification without departing from the principles and spirit thereof and for this reason I do not wish to be understood as limiting myself to the precise arrangement and formation of the several parts herein shown in carrying with a tapered valve seat, a valve snu out my invention in practice except as hereinafter claimed.

I claim:

1. In combination with the cylinder head of an internal combustion engine provided with the tapered valve seat, a valve snu ly fitting therein, said valve being provi ed with a recess in the end thereof and with ports communicating with the recess, the

ead having which the ports of the valve are adapted to register, the end of the valve provided with the recess havin an annular flange overlyin the head. said flange having an inward 1y directed oil ring, the adjacent face of the head having an annular groove in which said flange extends, said valve seat adjacent to its inner end being provided with an oil groove therearound, the cylinder head being provided with an oil port communicatin with the lower portion of the move, sai head being provided with an oi port leading from the groove in the head to the valve seat inwardly of the valve, said valve seat being also provided with a groove connecting the last named oilport and the first named oil groove in the valve seat.

2. In combination with the cylinder head of an internal combustion engineprovideid y fitting therein, said valve being provi ed inlet and exhaust ports with with a recess in the end thereof and with rts communicating with the recess, the ead having inlet and exhaust ports with which the ports register, the end of the valve provided with the recess having an annular flange overym wardly directed oil ring, the adjacent face of the head having an annular groove in which said flange extends, said valve seat adjacent to its inner end bein provided with an oil groove therearound, t e cylinder head being provided with an oil port communicatin with the lower portion of the groove, sai head being provided with an oil port leading from the roove in the head to the valve seat inwar ly of the valve, said valve seat being also provided with a groove connecting the last named oil ort and the first name oil groove in the va ve seat, said valve being rotatable and provided with a stem extending through the head portion of the stem within the head being provided with the substantially spiral oil groove in the periphery thereof, said head having an oil groove in communication with the valve seat inwardl of the valve and having communication wit the spiral groove of the stem of the valve are adapted tothe head, said flange having an m-- In testimony whereof I aflix nay-signature.

sAMUEL JAMES 'rmrr, JR. 

